Hi I am looking for some advice.. here is the situation.. I just got off the phone with an old friend and found out he is running a high end Threading company!.... He can make me any type of threaded rod I need and give me a great price on it...I am new to CNC and I am about to start building a CNC that will cut about 17" X 30" X 5" So my question is what would be the best Threaded rod to request from my friend? They use all types of materials. can some one give me the ideal specs for my situation & requirements?